Special calcium silicon-rich controlled release fertilizer for southern paddy rice and preparation method thereof

Abstract

The invention discloses a special calcium silicon-rich controlled release fertilizer for southern paddy rice and a preparation method thereof. The calcium silicon-rich controlled release fertilizer is made from the following raw materials in parts by weight: 50-70 parts of a 5% special calcium silicate coated compound fertilizer for paddy rice, 10-30 parts of a 8% special calcium silicate coated compound fertilizer for paddy rice, 20-40 parts of a special compound fertilizer for paddy rice and 1-3 parts of zinc sulfate. The 5% special calcium silicate coated compound fertilizer for paddy rice and the 8% special calcium silicate coated compound fertilizer for paddy rice respectively mean that mass of calcium silicate coated layers account for 5% and 8% of total mass. Contents of nitrogen, phosphorous and potassium in the special compound fertilizer for paddy rice are 18%, 8% and 20% respectively. In the controlled release fertilizer, nutrients are regularly released, which is identical with nutrient absorption rules of southern paddy rice; membrane materials are cheap and available, do not have degradation problem and are environment-friendly. The controlled release fertilizer is once applied before transplanting paddy rice, an additional fertilizer is no longer required, and application amount of the controlled release fertilizer is reduced by 20% of that of common fertilizers, thus reducing labor intensity and fertilizer fund input of farmers.

Description

technical field [0001] The patent of the present invention relates to the preparation technology of new fertilizers in agricultural production, a special silicon-rich calcium controlled-release fertilizer for southern rice and its preparation method, including calcium silicate coating method, the formula technology of special silicon-rich calcium controlled-release fertilizer for southern rice, application It is used in the field production of rice in the south, and belongs to the fields of agriculture and ecological environment. Background technique [0002] Rice is one of the most important food crops. More than half of the world's population, or 3 billion people, depend on rice for their livelihood. my country is a big rice planting country, and rice accounts for about 60% of residents' ration consumption, and the proportion is still increasing year by year. Rice not only solves the food problem of 1.3 billion Chinese people, but also makes a huge contribution to the wor...

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Problems solved by technology

The rice-specific controlled-release fertilizer developed by Shandong Kingenta Ecological Engineering Co., Ltd. is only applicable to the soil in the north. Its raw material composition is a mixture of nitrogen, phosphorus, and potassium fertilizers, and the coating material of nitrogen fertilizer (urea) is thermoplastic resin, which is not conducive to The soil degrades naturally; the controlled-release rice special blend fertilizer prepared by the Guangdong Academy of Agricultural Sciences also physic

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